Thank you so much for this comparison, I've been looking in the net for the last week or so for a comparison between these two and I could find nothing.
I really wanted the fit ear but found it quite hard to find in stock. I stumbled across the Noble 4 thread by accident when looking into getting some heir 4ai. Anyway to cut a long story short I have pulled the trigger on the Noble4 and should get it next week. I'm coming from the Grado gr10 and Ortofon eq5 , I was looking for something a little thicker but without any midbass hump. I tried the stagediver 2 but found they had too much midbass, although the other frequencies were excellent as well as the soundstage and imaging. But alas the curse of the midbass hump. I hope the N4 is the answer. I'll post my impressions once I receive them. I'd still love to try the fitear though.
You will enjoy the Noble 4 Very much i am sure.
Since posting the above i have played around a little more with tips and tried a couple of different sources as well. I still think the Fitear is fractionally more detailed but overall i am enjoying the N4 more as it presents most music in a more enjoyable way.
I have no experience with Grados so can't comment on comparative sound. If you want something essentially neutral, detailed and smooth with a bit of sparkle the N4 will go down a treat.
Edited by Sauntere - 5/5/14 at 7:46am